1 files changed, 3 insertions, 0 deletions
diff --git a/array.c b/array.c
index 9ef50cfee7..0eafbf01f3 100644
--- a/array.c
+++ b/array.c
@@ -1229,4 +1229,7 @@ Init_Array()
     rb_define_method(cArray, "nitems", ary_nitems, 0);
 
     cmp = rb_intern("<=>");
+
+    /* turn on premitive flag for the class */
+    FL_SET(cArray, FL_PRIMITIVE);
 }